Use of computed tomography in the emergency department for the diagnosis of pediatric peritonsillar abscess.

Objective: The objective of this study was to review our pediatric emergency department's (ED's) utilization of computed tomography (CT) in the diagnosis of peritonsillar abscess (PTA) and treatment outcomes.

Methods: This study used case series with chart review.

Results: From January 2007 to January 2009, 148 patients were seen in our ED for possible PTA. Mean age at presentation was 11.8 years (range, 10 months to 18 years); 81 (54.7%) of 148 were females. Computed tomography was ordered in 96 (64.9%) of 148 patients, of which 73 (49.3%) 148 were confirmed to have PTA. Mean age of patients who underwent CT was younger when compared with those who did not have CT performed (mean, 11 vs 13 years; P = 0.02). Unilateral PTA was found in 65 (43.9%) of 148, bilateral in 8 (5.4%) of 148, and intratonsillar in 25 patients (16.9%). Concomitant CT findings of parapharyngeal space involvement were found in 19 (12.8%), and retropharyngeal space involvement in 11 (7.4%). Admission was necessary for 104 (71.2%) of 148 patients, whereas 42 were discharged from the ED. Transoral needle aspiration and/or incision and drainage were performed in the ED in 41 patients, with purulence identified in 33 (80.5%) of 41. Rapid strep testing was positive in 40 (32%) of 124 patients tested. Operative treatment was necessary in 44 patients (29.7%), 34 underwent incision and drainage, and 10 underwent quinsy tonsillectomy.

Conclusions: Computed tomography is commonly utilized in the ED for the evaluation of PTA and is ordered more often in younger children.